XML 67 R56.htm IDEA: XBRL DOCUMENT v3.19.1
Loan Portfolio and Credit Quality Narrative (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 90 days or more past due $ 0 $ 0
Loans pledged in blanket lien agreement 2,700,000,000 2,600,000,000
Loans pledged as collateral 517,300,000 540,000,000.0
TDRs 10,200,000 8,000,000.0
Deferred income 8,700,000 8,500,000
Performing Financial Instruments    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
TDRs $ 6,700,000 $ 3,800,000